Reducing inheritance tax has become as important for many as retirement and education planning, according to DeVere Group, which carried out the survey.
Some 57 per cent of those under the age of 40 who became DeVere clients over the last 12 months actively sought advice on estate planning in their initial meeting.
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Nigel Green, Devere's founder and chief executive, said: "There's been a clear awakening and a groundswell of resentment amongst this age group about the burden of inheritance tax.
"Over the last 12 months it has become a major priority to our clients under 40 – indeed for many it has become as important as retirement and education planning.
"We have always advised our clients that estate planning should play an integral part of their long-term financial strategy, but increasingly our clients are coming to us with the clear objective of mitigating their IHT liabilities.
"And it's not just the over 60s –traditionally the ones who would actively seek advice on this subject."
The Government announced last February that it was freezing the IHT threshold at the current level of £325,000 until at least 2019.